Lathe.



M. ISNARD.

LATHE.

APPLlCATlON HLED men, 1916.

1,265,785 Patented Mayl l, 1918.

4 SHEETSSHEET I- iNVENTD/y Mai 272:6 jsnamzl ATTUFjNEY;

M. ISNARD.

LATHE.

APPLICATION FILED AUG.25| 19H).

1,265,785.. Patented May 14,1918.

,4 SHEETS-SHEET 2.

M. ISNARD.

' LATHE. APPLICATION FILED AUG-25, I916.

1,265,785. Patented May 14, 1918.

4 SHEETS-SHEET 3.

nvvmvma Maren/6a ZEna Z QJW Q ATTUF7NEY M. ISNARD.

LATHE.

APPLICATION FILED AuG.25, I916.

I 1,265,785. Patented May 14, 1918.

4 SHEETSSHEET 4.

UNITED STATES PATENT OFFICE.

MAXENCE ISNARD. OF GRENOBLE, FRANCE.

LATHE.

Application filed August 25, 1916.

To all to hom it may concern Be it known that I, MAXENOE IsNARD, a citizen of the Republic of France, residing at Grenoble, France, have invented certain new and useful Improvements in Lathes, of which the following is a specification.

The present invention relates to lathes, and its object is the provision of a simple, strong lathe, which may be constructed with great rapidity, and which may be used to very great advantage especially in the turning of shells.

An embodiment of the invention is illus' trated in the accompanying drawing, wherein:

Figure 1 is a side elevation.

Fig. 2 is an end elevation, showing one of the frames.

Fig. 3 is a similar side elevation, showing, in addition, the carriage.

Fig. at is a side elevation, showing the control mechanism for shifting the carriage transversely.

Fig.6 is a plan view, showing the device for pointing the end of the shell.

Figs. 6, '7 and ,8 show a modification, in which the carriage is combined with a former, Fig. 6 being a front elevation thereof, Fig. 7 a. plan view, and Fig. 8 a side elevation. The hand wheel and directly related parts shown in Fig. 8 are omitted for the sake of clearness from Figs. 6 and 7.

This type of lathe isformed essentially of three frames at, a and a, ,(Fig. 1), which maybe of any suitableform, but are preferably triangular, as shown. These frames are reinforced or thickened at their. bottoms, and each is pierced at its apex or top with a hole 6. the several holes serving for the reception of a bar 0 which unites with said frames to form the body or framework of the lathe, and upon which the said frames are firmly connected in any desired position, according to the lengths of the articles to be turned. This attachment may be effected by means of threaded bolts (6 or by any other suitable devices.

Each of the frames a, a and a. has, in addition, a central boss or bearing sleeve (Z which, in the case of the frame (4, receives the movable center c with its control elements (as shown in Fig. 1 of the drawing), while those of the frames 0. and a receive the work spindle 7', upon which latter fixed Specification of Letters Patent.

Patented May 14, 1918.

Serial No. 116,912.

and movable pulleys f, f are mounted between said frames a and a".

In addition, the two frames at and a are pierced at their bases with two holes g, in which the ends of two bars h are journaled, the axes of the portions of said bars lying between frames a and a being eccentric with relation to the axes of the end portions of the bars which fit in the holes 9. The ends it of the said bars which project through the holes in the intermediate frame a are connected to control levers j, which are coupled together (Fig. f) for movement in unison.

A tool-supporting carriage or tool holder 2' is mounted upon the eccentric bars h be tween frames a and a, so that the manipu lation of either control lever causes the tool supporting carriage to move in a transverse direction, bringing the tool or tools farther from or nearer to the work. In this way, there is produced a slight elevation or a slight descent of the carriage, but this vertical displacement is relatively small and pre' sents no difiieulties in the case now under consideration, the dimensions of the shells to be turned being given.

As may be seen, the lathe thus constructed is easily and simply made, and is at the same time of great strength, since the coupling of the frames at their upper ends by the bar 0 insures great rigidity and, as is evident, offers resistance to spreading to a much greater degree than in the ordinary lathes where the members of the framework are supported only at their lower portions.

In addition, each of the frames a, a and a is provided at the center of its base with another hole 70, these holes receiving the feed screw c of the carriage, which may be controlled by any suitable means.

Fig. 5 shows a device which may be used to advantage to point the end of the shell. For this purpose one of the tool supports Z is pivotally mounted on a pin 0, which is located at a suitable point selected according to the curvature of the point of the shell. At the rear of said pin 0, a slot m is provided on the carriage, and the pin 0 slides in this slot during the movement of the carriage.

When the carriage moves forward in the direction of the arrow 1, (Fig. 5), the pin 0 strikes against a suitable stop (not shown) on the frame a, thus preventing the pin 0 from following the movement of the carriage. The latter, however, may continue to advance, owing to the provision of slot, the said pin moving rearward in said slot.

As has been stated above, Figs. 6, 7 and 8 show a special tool-support or carriage arrangement combined with a former, and its disposition on the lathe.

This device consists of two frames 22, p, preferably triangular, attached at their bases to the under side of the flat, plate-like body of the slide or carriage i; said frames being capable of moiniting on one of the bars 0 of the lathe frame, as shown in Fig. 8, or on both bars 0, so as to slide on said bars with the carriage. The frames 7) carry at their lower ends or apices a shaft 9, on which are mounted, between the frames 32 p, ribbed arms r r, carrying the tools 1*, as shown in Fig. 8.

The carriage 2' is provided with two holes a and .9, through which the ribbed arms *1 and 1* pass, the holes a and a being so formed as to permit said arms r and r to move in a plane perpendicular to the axis of the lathe, oscillating around shaft 9. Members 6, i 25 are arranged on the carriage 9: above the holes .9, a, in such a way as to form guides in which the ribbed arms 7'', i slide with slightv friction, as the tools approach the work or recede from it.

Each of the ribbed arms 7', is provided, preferably at its upper portion, with an eye or sleeve 1/, in which is seated a shaft 0, the position of which may be regulated by means of nuts and lock nuts w and a" and hand wheel 1 The latter and the nuts 02, m are represented in Fig. 8, but are omitted from Figs. 6 and T to avoid confusion. The rear ends of the shafts r bear against the former a, suitably attached to the frame of the lathe by means of cross beam 2 for example, as shown in Figs. 6 and 8; and, in the forward movement of the carriage, the said rear ends of these shafts '0 will slide along the former for which purpose, the shaft ends may terminate either in the form of a pointer cone as shown at 0, Fig. 7, or may carry a roller as shown at o, Figs. 7 and 8.

It is to be understood that the number of ribbed arms, each carrying a tool 7, may vary, and two of these arms, the distance be tween which will be suitably adjusted, may be arranged for example, as shown in the drawing, in such a way as to effect, by each one of them, the turning of a single portion only of the length of the shell.

it the beginning of the turning operation, the engagementof the tools'against the shell will be facilitated by slightly loosening the wheel y, and the tools being brought into be obtained tohordes of this pate ing carriage was mounted, as shown and described in connection with Figs. 1 to 5,

for determining the distance which the tools were to be withdrawn from, or advanced toward the work, the present arrangement being considered preferable in certain cases.

In addition, the shaft 9 may itself be mounted in such a way that the part of this shaft on which the ribbed arms r, 1 are mounted is eccentric with relation to the ends of said shaft which pass through the frames 2), p so as to permit of positive adjustment in height as well as laterally, if it is considered necessary that the shaft around which the ribbed arms oscillate should be appreciably on the vertical tangent of the diameter of the object to be turned.

1 claim as my invention:

1. In a lathe, the combination of a framework comprising a series of vertical tri angular fl'tlll'lQS arranged in spaced, parallel relation transversely of said framework, said frames having alining horizontal openings formed through their apices and bases, and tie rods extending through said openings and rigidly secured to said frames to join the same together; a centering device mounted in the frame at end of the series; a work spindle rotatably mounted in the other end frame of the series and in the intermediate frame in line with said centering device; and tool-carrying means located between the first-named end frame and the intermediate frame and arranged to travel longitudinally of the framework; said toolcarrying means being movable transversely of the framework independently of its longitudinal movement, to bring the tool nearer to or farther from the work;

Q. In a lathe, the combination of a framework comprising a series of vertical frames arranged in spaced, parallel relation transversely of said framework, said frames having alining horizontal openings formed through their upper and lower portions, and tie rods extending through said openings and rigidly secured to said frames to join the same together; and tool-carrying means located between one of the end frames of the series and the adjacent frame and arranged to travel longitudinally of the framework; said tool-carrying means being movable transversely of the framework inclependently of its longitudinal movement, to bring the tool nearer to or farther from the work.

In testimony whereof I afiX my signature.

MAXENCE l'SNAltlD.

my addressing the of Patents, jg 52 

